Palaeoclimatic implications of the magnetic record from loess/palaeosol sequence Viatovo (NE Bulgaria)

被引：48
作者：
Jordanova, Diana
Hus, Jozef
Geeraerts, Raoul
机构：
[1] Bulgarian Acad Sci, Inst Geophys, BU-1113 Sofia, Bulgaria
[2] Ctr Phys Globe, Dourbes, Belgium
来源：
GEOPHYSICAL JOURNAL INTERNATIONAL | 2007年 / 171卷 / 03期
关键词：
Bulgaria; loess; magnetite; maghemite; palaeosol; rock magnetism;
D O I：
10.1111/j.1365-246X.2007.03576.x
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Loess-palaeosol deposits in the lower Danube area represent the southeastern edge of the loess cover in Europe. Detailed rock magnetic investigations of the loess/palaeosol sequence in Viatovo in NE Bulgaria reveal that magnetite and maghemite of very fine superparamagnetic grain size are responsible for the magnetic enhancement of palaeosol units. A detailed palaeoclimatic record is obtained through high-resolution measurements of magnetic susceptibility, frequency dependent magnetic susceptibility and CaCO3 content. Magnetic proxies indicate a more warm and humid climate during the development of the older palaeosol units (S-4-S-6).
引用
收藏
页码：1036 / 1047
页数：12
相关论文
共 54 条
[1]  
[Anonymous], 1994, SYSTEM QUANTITATIVE
[2]  
[Anonymous], ORGANIC MATTER SOILS
[3]   The role of dust source area and pedogenesis in three loess-palaeosol sections from North Bulgaria: A mineral magnetic study [J].
Avramov, V. I. ;
Jordanova, D. ;
Hoffmann, V. ;
Roesler, W. .
STUDIA GEOPHYSICA ET GEODAETICA, 2006, 50 (02) :259-282
[4]   Formation of cubic phases on heating ferrihydrite [J].
Campbell, AS ;
Schwertmann, U ;
Campbell, PA .
CLAY MINERALS, 1997, 32 (04) :615-622
[5]   Characteristics and genesis of maghemite in Chinese loess and paleosols: Mechanism for magnetic susceptibility enhancement in paleosols [J].
Chen, TH ;
Xu, HF ;
Xie, QQ ;
Chen, J ;
Ji, JF ;
Lu, HY .
EARTH AND PLANETARY SCIENCE LETTERS, 2005, 240 (3-4) :790-802
[6]  
Cornell R. M., 1996, The iron oxides: structure, properties, reactions, occurrence and uses.
[7]   Secondary ferrimagnetic minerals in Welsh soils: a comparison of mineral magnetic detection methods and implications for mineral formation [J].
Dearing, JA ;
Bird, PM ;
Dann, RJL ;
Benjamin, SF .
GEOPHYSICAL JOURNAL INTERNATIONAL, 1997, 130 (03) :727-736
[8]   Mineral magnetic properties of loess/paleosol couplets of the central loess plateau of China over the last 1.2 Myr [J].
Deng, CL ;
Zhu, RX ;
Verosub, KL ;
Singer, MJ ;
Vidic, NJ .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2004, 109 (B1)
[9]   Mineral magnetic variation of the Jiaodao Chinese loess/paleosol sequence and its bearing on long-term climatic variability [J].
Deng, CL ;
Vidic, NJ ;
Verosub, KL ;
Singer, MJ ;
Liu, QS ;
Shaw, J ;
Zhu, RX .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2005, 110 (B3) :1-17
[10]   Stacked 2.6-Ma grain size record from the Chinese loess based on five sections and correlation with the deep-sea δ18O record -: art. no. 1033 [J].
Ding, ZL ;
Derbyshire, E ;
Yang, SL ;
Yu, ZW ;
Xiong, SF ;
Liu, TS .
PALEOCEANOGRAPHY, 2002, 17 (03) :5-1
123456